And of course, there's Satya Nadella, who has been at Microsoft since 1992, when founder Bill Gates was still at the helm. Nadella joined after graduating from the University of Wisconsin-Milwaukee and working at Sun Microsystems, and he later went on to get an MBA at the University at Chicago's Booth School of Business while at Microsoft.
In 2007, Nadella was named senior VP of Microsoft Online Services, which put him in charge of Bing and early online versions of Microsoft Office and the Xbox Live gaming service. In 2011 he was promoted to president of the Server and Tools Division, overseeing the Windows Server, the SQL Server database, and the Microsoft Azure cloud platform.
Since taking the reins as CEO in 2014, Nadella has been credited with putting Microsoft back on track: He improved company morale, fast-tracked exciting new products like Microsoft HoloLens, and helped the company move beyond a troubled period in its history marked by the disastrous Nokia acquisition and disappointing products.
The turnaround job is still a work in progress, but Nadella has put many of the pieces and people in place.